/*************************************************************************
        > File Name: 06.pattern.c
        > Author: icebear
        > Mail: 3322366195@qq.com
        > Created Time: Tue 18 Jul 2023 12:29:55 PM UTC
 ************************************************************************/

#include <stdio.h>
int main()
{
    int i=0,j=0;
    for(i=0;i<6;i++)
    {
        for(j=0;j<i;j++)
        {
            printf("_");
        }
        for(j=0;j<i;j++)
        {
            printf("%C",'F'-j);
        }
        printf("\n");
    }
}
